If I attack with Naganadel GX's "Stinger GX" attack, how would it work if my opponent has received a "Double Prize Loss" or a "Quad Prize Loss" penalty earlier in the game?
For a "Double Prize Loss" you only need to take one more prize from the remaining three to win the game. If your opponent received a "Quad Prize Loss" you win the game because you have less than four prizes remaining.
Source: TPCi Rules Team (2018-05-09)
Can I decline to take the benefit of a "Double Prize Loss" or a "Quad Prize Loss" penalty given to my opponent?
No, it simply changes the number of prizes needed to be taken to achieve a win condition. You and your opponent MUST sign any required Prize Card Penalty Slips, keep track of the new number of remaining prizes needed to win, and anything else necessary to implement the penalty.
Source: TPCi Rules Team (2018-04-26)
If my opponent receives two "Double Prize Loss" penalties and I only have four prizes left in a six prize game, what happens?
As soon as the number of prize penalties meets or exceeds the number of remaining prizes needed to win, the game is over. In this situation you win.
Source: TPCi Rules Team (2018-04-26)
I have Hidden Legends Electrode and use "Mass Destruction" to knock out Electode and the defending Pokémon. If I have only one prize left and my opponent has more, but I have no bench and my opponent has a bench, do I still win?
No, in this situation it would go to Sudden Death. However, if the opponent did not have any Pokémon on their bench, the Electrode player would have two win conditions vs. one, and would therefore win the game.
Source: PUI Rules Team (2005-03-10)
Scenario: It's down to one prize each, your turn with 10HP left, and you're poisoned. You attack and KO your opponent to draw your last prize. But you take poison damage and would be KO'd now too. Do you win or does it go to Sudden Death?
You win, you must complete the rest of the combat sequence, but then if you win BEFORE the end of the turn, you win, period. Poison doesn't happen until after the end of your turn.
Source: WotC Chat (2000-10-05)
What happens if I use Professor [Juniper] and have less than 7 cards left in my deck? Do I lose immediately, or do I draw out the remainder of my deck and lose at the beginning of my next turn (if I don't do anything to replenish the deck like Recycle, Mr.Fuji,
You only lose when you don't have any cards to draw on; the card draw you must do on the start of your turn. So you would lose on your next turn if you didn't somehow get some cards back into your [draw] deck.
Source: WotC Chat (2000-08-03)
If my opponent had 3 cards left in his deck and I used Wildfire to discard the three cards, on his/her next turn do I win?
Yup, you would, if someone cannot draw a card at the start of their turn like they are supposed to, they lose.
Source: WotC Chat (2000-03-09)
If I draw my last card. It is an Electric Energy so I use Raichu's Gigashock and it kills all of my opponents. Who wins?
You do, because you won't actually lose for being out of cards until the beginning of your next turn.
Source: WotC Chat (2000-02-24)
At the end of a long match, I Selfdestruct Magneton. My opponent and I both take our last Prize cards. Who wins?
Well, if one of you has a Benched Pokémon to replace your Active Pokémon and the other player doesn't, then the person who can replace his or her Active Pokémon wins. Otherwise, you play Sudden Death. This is explained in the Pokémon rules in the Expert Rules section under "What Happens if Both Players Win at the Same Time?"
Source: WotC Chat (1999-10-04)